By now you all know that Drupal 7 is awesome, and you know why it's awesome.
You also know that one of those reasons is RDFa support.
What you might not know is that there's a RDFa standard for ecommerce called GoodRelations, and that it's pretty awesome by itself. You should.

We'll cover:
- What is GoodRelations, what it does, and how it's used today by search engines.
and then when you realize that you need to have it, we'll cover:
- How to enable GoodRelations support for Drupal Commerce, how it works, what it does and does not do, and how it compares to competition (integration modules for Joomla, WordPress, Magento)